Outage in Microsoft 365
Some users may experience unexpected application crashes for Microsoft Teams on MacOS devices
Resolved Minor
September 18, 2026 - Started about 18 hours ago
- Lasted about 3 hours
Incident Report
Summary AI Generated
Microsoft Teams experienced unexpected application crashes on macOS devices running the 27.2 beta update, lasting approximately 3.3 hours. The crashes were caused by a regression in macOS 27.2 beta that disrupted Teams' video background effects and noise suppression features. Microsoft identified the root cause and was developing a fix using an alternate code path to remediate the issue.
Title: Some users may experience unexpected application crashes for Microsoft Teams on macOS devices
User impact: Users may experience unexpected application crashes for Microsoft Teams on macOS devices.
More info: Impact is specific to users who have updated to their macOS devices to version 27.2 beta.
Current status: We've identified a significant increase in Microsoft Teams application crashes affecting macOS devices on version 27.2 beta and are investigating the underlying cause. We're continuing our analysis of crash telemetry and related diagnostic data to determine the source of impact and develop a remediation plan.
Scope of impact: Impact is specific to users experiencing unexpected application crashes for Microsoft Teams on version 27.2 beta macOS devices.
Next update by: Friday, September 18, 2026, at 3:30 PM UTC
User impact: Users may experience unexpected application crashes for Microsoft Teams on macOS devices.
More info: Impact is specific to users who have updated to their macOS devices to version 27.2 beta.
Current status: We've identified a significant increase in Microsoft Teams application crashes affecting macOS devices on version 27.2 beta and are investigating the underlying cause. We're continuing our analysis of crash telemetry and related diagnostic data to determine the source of impact and develop a remediation plan.
Scope of impact: Impact is specific to users experiencing unexpected application crashes for Microsoft Teams on version 27.2 beta macOS devices.
Next update by: Friday, September 18, 2026, at 3:30 PM UTC
Components affected
Microsoft TeamsTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
about 16 hours ago - at 09/18/2026 03:34PM
Title: Some users may experience unexpected application crashes for Microsoft Teams on MacOS devices
User impact: Users may experience unexpected application crashes for Microsoft Teams on MacOS devices.
More info: Impact is specific to users who have updated their MacOS devices to version 27.2 beta.
Current status: We've identified that the reported impact is limited to users running MacOS 27.2 beta. Our investigation indicates that the crashes are associated with video background effects and noise suppression functionality due to change in MacOS 27.2 beta that causes a regression in Microsoft Teams. We're creating a change to utilize an alternate code path for these features, which may potentially complete and remediate impact by our next scheduled update.
Scope of impact: Impact is specific to users experiencing unexpected application crashes for Microsoft Teams on version 27.2 beta macOS devices.
Root cause: MacOS version 27.2 beta causes a regression for the video background effects and noise suppression functionalities in Microsoft Teams, resulting in impact.
Next update by: Friday, September 18, 2026, at 8:00 PM UTC
about 18 hours ago - at 09/18/2026 01:24PM
Title: Some users may experience unexpected application crashes for Microsoft Teams on macOS devices
User impact: Users may experience unexpected application crashes for Microsoft Teams on macOS devices.
More info: Impact is specific to users who have updated to their macOS devices to version 27.2 beta.
Current status: We've identified a significant increase in Microsoft Teams application crashes affecting macOS devices on version 27.2 beta and are investigating the underlying cause. We're continuing our analysis of crash telemetry and related diagnostic data to determine the source of impact and develop a remediation plan.
Scope of impact: Impact is specific to users experiencing unexpected application crashes for Microsoft Teams on version 27.2 beta macOS devices.
Next update by: Friday, September 18, 2026, at 3:30 PM UTC
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